//
//  XYObject.m
//  KVO
//
//  Created by yao zhaofeng on 2018/4/4.
//  Copyright © 2018年 YaoZhaofeng. All rights reserved.
//

#import "XYObject.h"

@interface XYObject()
@end

@implementation XYObject

- (void)willChangeValueForKey:(NSString *)key {
    NSLog(@"willChangeValueForKey::%@", key);
}

- (void)didChangeValueForKey:(NSString *)key {
    NSLog(@"didChangeValueForKey::%@", key);
}
@end
